One starts from the polynomial
      
      and extends one by one with
      
      until the final polynomial defining this rule is reached.
      Note: Polynomials might be truncated due to size!
      The complete polynomials are included in the download.
    
| Node (ball center) | Error (ball radius) | 
|---|---|
| 0.5 + 3.433096697485088613e-52j | 6.99e-52, 6.99e-52j | 
| -0.5 + 4.3868543705008816023e-84j | 1.1e-83, 1.1e-83j | 
| Weight (ball center) | Error (ball radius) | 
|---|---|
| 0.25 - 8.5827417437127215324e-53j | 4.78e-32, 5.24e-52j | 
| 0.25 + 8.5827417437127215324e-53j | 4.78e-32, 5.24e-52j | 
All rules of Chebyshev U (second kind) type can be downloaded here packed into a single file.